Improper Restriction of Excessive Authentication Attempts in Nextcloud Enterprise Server and Nextcloud Server - CVE-2023-39960
Published: October 17, 2023
Vulnerability identifier: #VU82082
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-39960
CWE-ID: CWE-307
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the number of login attempts is not limited within the WebDAV endpoint. A remote user can perform a brute-force attack.
Affected software
Nextcloud Enterprise Server
Nextcloud Server
Nextcloud Server
How to mitigate CVE-2023-39960
Install updates from vendor's website.
Nextcloud Enterprise Server - addressed in versions 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4
Nextcloud Server - addressed in versions 25.0.9, 26.0.4
Nextcloud Server - addressed in versions 25.0.9, 26.0.4